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4.
The computer sends the Printer Select Code followed by a
printer port number. If the port number is the same number as
that of the current print job, this will indicate the end of the
current print job, and the next print job will be routed to the
same printer. If the port number is a different number from that
of the current print job, this will indicate the end of the current
print job, and the next print job will be routed to the newly
selected printer.
NOTE: In Printer Select Mode 2, when the input inactivity timeout is
set to 0 seconds, a print job is ended only when the computer sends
the Printer Select Code followed by a printer port number or the clear
buffer command.
In Printer Select Mode 1, a print job is ended when no characters are
received by Print Master from the computer for the specified input
inactivity timeout period.
CAUTION: The input inactivity timeout should not be set to 0 (zero)
seconds in Printer Select Mode 1.
If Print Master's buffer fills, Print Master will drop the CTS line or send
an XOFF to the computer, causing the computer to stop sending
characters until the buffer can accept more data. In this case, the
time that the computer is not sending characters is not counted as
part of the input inactivity timeout.
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